| 12 & 13 | RPM Signal | Distributor Or Ckt, Starter Ckt, ECU |
| 14 | Ignition Signal | Ignitor Or Ckt To ECU, ECU |
| 16 | Electronic Controlled Transaxle Signal | Transaxle ECU Or Ckt |
| 21 (2.2L) | Main O2 Sensor Signal | O2 Sensor Or Ckt, ECU |
| 21 (3.0L) | Main O2 Sensor Signal | O2 Sensor Or Ckt, (1) O2 Sensor Heater, ECU |
| 22 | Coolant Temp. Sensor Signal | Coolant Temp. Sensor Or Ckt, ECU |
| 24 (2) | IAT Sensor Signal | Intake Air Temp. Sensor Or Ckt, ECU |
| 25 | Lean Air/Fuel Mixture | Loose Ground, Injector Or Ckt, O2 Sensor Or Ckt, Fuel Pressure, Ignition Sys, Coolant Temp Sens, (3) Airflow Meter/Vacuum Sens, ECU |
| 26 (4) | Rich Air/Fuel | Loose Ground, Injector Or Ckt, Mixture O2 Sensor Or Ckt, Fuel Pressure, Cold Start Injector Or Ckt, Coolant Temp Sens, (3) Airflow Meter/Vacuum Sens, Compression Pressure, ECU |
| 27 (2.2L) (4) | Sub-O2 Sensor Signal | Sub-O2 Sensor Or Ckt, ECU |
| 27 (3.0L) (4) | Sub-O2 Sensor Signal | Sub-O2 Sensor Or Ckt, ECU |
| 28 (1) | Main O2 Sensor Signal | O2 Sensor Or Ckt, (1) O2 Sensor Heater, ECU |
| 31 (2.2L) | Vacuum Sensor Signal (3) | Vacuum Sensor Or Ckt, ECU |
| 31 & 32 (3.0L) (1) | Airflow Meter Signal (3) | Airflow Meter Or Ckt, ECU |
| 41 (2) | Throttle Position Sensor Signal | Throttle Position Sensor Or Ckt, ECU |
| 42 (5) | Vehicle Speed Sensor Signal | Vehicle Speed Sensor Or Ckt, ECU |
| 43 (5) | Starter Signal | Starter Signal Ckt, Main Relay, Ignition Switch Or Ckt, ECU |
| 51 (5) | Switch Condition Signal | A/C Switch Ckt, Neutral/Start Switch Or Circuit, TPS Or Ckt, ECU |
| 52 & 55 (1) | Knock Sensor Signal | Knock Sensor Or Ckt, ECU |
| 53 | Knock Sensor Control (ECU) | ECU |
| 71 (4) | EGR Sys Malfunction | EGR System, EGR Temp Sensor Or Ckt, EGR-BVSV, ECU |
| (1) Used only on V6 models. (2) CHECK ENGINE light comes on only for Calif. models. (3) Airflow meter used on 3S-GTE. Vacuum sensor used on 5S-FE. (4) Used only on Calif. models. (5) CHECK ENGINE light will not come on when code is set. |
